Hello @Admin EnterByte ,
Welcome to Microsoft QnA.
Did you take a snapshot of the VM's OS disk before generalizing the VM?
I am assuming your tried to sysprep the VM correct?
If you have manually taken a snapshot or created a backup of the VM from a point in time before generalizing the VM, only then can you recover the VM from prior state.
Hope that information helps.
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if the above information is helpful.